Police Capt. Richard Fuller said Michael K. Fay, 48, of 61 Coolidge Ave., was arrested after he left Buck’s Bar and Grill at 416 Middle St., where he allegedly pinned a bar patron between his vehicle and a second vehicle as he drove away without paying his bar tab.

Fuller said the victim, a 38-year-old male, was taken to South Shore Hospital and then transferred to Brigham and Women’s Hospital with “severe trauma.”

Fuller said Monday morning that the victim is still in serious condition.

Fay is charged with a second offense of operating under the influence of alcohol, leaving the scene of an accident with personal injury, operating under the influence causing serious bodily injury, operating to endanger, and leaving the scene of an accident with property damage.

He was held overnight in the Weymouth jail on $5,000 bail and will be arraigned Monday in Quincy District Court.

Fuller said witnesses told police that Fay left Buck’s just after 8:30 p.m. Sunday, and that the patron followed Fay outside and demanded he return to pay his bill.

When Fay allegedly backed his vehicle out to leave, he pinned the customer between his vehicle and a parked vehicle. Police say Fay fled and was stopped on North Street, where he was arrested after allegedly failing field sobriety tests.

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